This page was created to possibly help others who don't understand endothermic and exothermic reactions as well as they want or need to. The basic definitions are easy to understand: Endothermic: a reaction or process which absorbs heat from its surroundings. Exothermic: a reaction or process which gives off heat to its surroundings. The problem comes in trying to state which specific examples of reactions are which, because usually a lot of things are going on at the same time.
A HillâSachs lesion, or HillâSachs fracture, is a cortical depression in the posterolateral head of the humerus. It results from forceful impaction of the humeral head against the anteroinferior glenoid rim when the shoulder is dislocated anteriorly.
Shoulder impingement syndrome when the tendons of the rotator cuff and the subacromial bursa are pinched in the narrow space beneath the acromion. The bursa is a cushion between the rotator cuff and the acromion bone. This causes the tendons and bursa to become inflamed and swollen.